I don't think the E-Reader was released anywhere in Europe. I know for sure that it wasn't out in the UK. If there is a Euro version I doubt it would read cards from other regions as the JPN an US readers are incompatible as it is.

e-Reader dotcodes contain duplicate blocks of dots - a few blocks can be damaged and the card can still be read. The dotcodes can be converted to their raw data (*.raw) and then from there to decrypted binary files (*.bin).

The dumps are out there, but No-Intro cannot legally distribute them. I question your ability to Google - it was a little difficult to find e-Reader information but definitely not impossible. And whoever wrote that article doesn't know what they're talking about. Clearly the cards listed in the above links are the rarest e-cards.

The song playing on that site its "[size="-1"]Yo Ho, It's The Pirates Life For Me!" You really wonder whether those dumps are legal or not? I don't care, and Nintendo doesn't care (e-Reader is very old and unwanted)[/size], but GBAtemp cares about sharing illegal stuff.

My question is "what is the most decrypted an e-Card can be?" I asked on the No-Intro forums a year ago, and the answer I got never worked for me. But if I recall correctly, it involved merging the e-Cards together using the command line (?) and running that through one of Caitsith2's VPK tools to get a .vpk file that is fully decompressed / decrypted. Then you can modify the contents of the card.